Final answer:
The ancient commodity placemark highlights the production of Olive Oil, which was a popular and profitable product in the ancient world. The Mycenaeans in Greece cultivated olives to produce this valuable commodity, which was in high demand and sustained seagoing trade.
Step-by-step explanation:
The ancient commodity placemark highlights the production of Olive Oil. Olive oil was a popular and profitable product in the ancient world, and the Mycenaeans in Greece learned to cultivate olives to produce this valuable commodity. It was in great demand all over the ancient world and sustained seagoing trade. Olive oil was often shipped in amphorae, which were large storage vases ideal for transportation.